Exhausted from trying to figure out what this is, exactly!

Solution to a neighboring classroom with a nonworking A/C. Cardboard comes through in a pinch!

From the submitter:

"The heater in my son-in-law's truck only blew warm air from the dash front vents, so I suggested he go to a home improvement place and buy this flexible hose and tape it in place! This got him through a lot of cold weather, giving him a clear windshield inside without a problem!"

From the submitter:

"The only A/C in the apartment was in the living room with a wall fan to draw in the cool air to the bedroom. With 95+ degree summers, that didn't cut it so I took a box and some duct tape and made a direct vent. Worked perfectly!"

Okay, the A/C unit in the door I can forgive, but the fact that it also opens up to nowhere? Double derp points!